That's a great idea, hope I get on enough to train up and participate
Maybe you could do tier fights (20th level and below one fight, 21st and above for the other)
Or maybe a no magic fight, or a magic only fight, etc.?
Maybe ranged weapons only, or only melee.
Maybe even make it the IW EfU yearly tournament, and if people see the prize (NPC named after them, or whatever) it may entice more people to buy the games and join in!